Rohde & Schwarz 1164.4391.03, Service Manual

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R&S FSP Module Replacement
1164.4556.82 3.15 E-1
Replacing the Front Module Controller A90
( See chapter 5, spare parts list, item 577, and explosion drawings 1164.4391, 1164.4404.)
The front module controller is mounted behind the front panel.
Opening the Instrument and Removing the Front Panel
Switch off the instrument and pull the mains plug.
Unscrew the four screws (430) of the front handles on both sides and take off the front handles.
Remove the volume control knob (Option R&S FSP-B3), if present, by pulling it off.
Pull off the labelling panel (270) towards the front.
Unscrew two countersunk screws (610) in the front frame each at the top and at the bottom.
Remove the front panel with keyboard and display (600, 620, 630, 640, 650, 660) to the front and
rotate it to the top of the instrument.
CAUTION
Note the connecting cables are still connected to the controller.
Pull off the connecting cables to the adapter board (LCD, DC/AC illumination converter), keyboard
membrane, spinwheel, sata data and sata power.
Note: When pulling off the connecting cables be careful with the cable connecting to the
keyboard. It is a film cable which can only be disconnected after sliding up the lock of the
film cable plug.